mkv help

Matroska is more commonly used for larger format encoding, 720p, 1080p and in those sizes would require much higher bitrates. There is no particular reason to go to mkv although it supports a wide range of formats and goodies including AC3 audio. I've not heard it used for the small videos you have been making.
 
The simplest way to find out is to try it. If you start adding a lot of mkv goodies like subtitles, menus and multiple audio streams then you will have to increase the bitrate. Mkv is a container like Avi. Avi is generally used for smaller video. It's the codec that determines the quality. If you use the MP4 AVC codec without any frills at small size it's no different to MP4 and less compatible with some players.
 
thanks but

Thanks for the help now just one more thing?

I know standard TV is 640x480 with an aspect ratio of 4:3
And I see a lot of things on the net that say it is the aspect ratio that changes and determines wide screen or standard.

So if I have a wide screen DVD and I want to say make it MP4 can I keep it at 640x480 but just change aspect ratio to 16:9?

I am useinf Format Factory and I can pict screen size and I have to pick aspect ratio as well
 
robertbiferi said:
Thanks for the help now just one more thing?
I know standard TV is 640x480 with an aspect ratio of 4:3
Click to expand...
TV is not 640x480 - the size depends on how and when you measure it, but the picture aspect ratio is 4:3.

So if I have a wide screen DVD and I want to say make it MP4 can I keep it at 640x480 but just change aspect ratio to 16:9?
Click to expand...
Most of the time, no. Current digital formats are generally the same aspect as the final show. The typical size for a 16:9 at small size is 624x352. To avoid splitting macro blocks into small bits, it's best to have the dimensions exactly divisible by 16.

If you decide to size on a background of 640x480 and expand the video to 640x360, you will have black bars top and bottom. If you don't have black bars top and bottom you have encoded incorrectly (with this method only). That will increase file size slightly for no benefit in picture quality. You can do it that way. Nobody else does. In Format Factory that would be Video Size 640x480 and Aspect Ratio 16:9 as you mentioned.

If your source is dvds, some old widescreen movies are actually fullscreen aspect video with black bars already on the video. If that is the case, you have to make the final video size 4:3 aspect ratio. The picture portion will come out 16:9. You have to use commonsense. If you have very thin or very fat people, you got it wrong.
 
thanks but

Well maybe you can help with this?

When I convert my NTSC DVD TV show to mp4 it works.

But it is of the Old Buck Rogers TV show from the 70's so I know it was Interlaced.

So I thought when I convert it to mp4 I pick the Option De Interlace because I know that any new TVs will be prograsive Scan TV's.

And when it is converted I pplay the file on my computer with VLC and it splits the screen.
The top half has one whole video and the bottum half has the same whole video playing at the same time.

So I wanted to know does mp4 support Prograsive Scan or is it that now DVDs are encoed as Interlace or De Interlace?
 
All retail dvds are interlaced video. The format was designed to work with analog TVs. If you are converting to progressive, you have to deinterlace. I have never been able to select Deinterlace in Format Factory. When I click Yes it changes back to No. I suspect the software has a glitch. Anyone else found the same? Presumably you did get the Deinterlace option to stay at Yes?

I don't know why you are getting the effect of double image. It sounds like it is playing one interlace field at the top, the other interlace field at the bottom.
 
thanks but

Thank you for the help when I convert my DVD to MP4 I uncheck De Interlace and Interlace and now they comeout good.

One thing If I pick De Interlace is this not going to make it Prograsive Scan?
 
robertbiferi said:
Thank you for the help when I convert my DVD to MP4 I uncheck De Interlace and Interlace and now they comeout good.
Click to expand...
Have you checked the action sequences? If you don't deinterlace dvd video you will have zigzags.

One thing If I pick De Interlace is this not going to make it Prograsive Scan?
Click to expand...
Yes, unless you force the output back to interlaced video. These days you don't want to be doing that.
 
thanks but

This is what I thought but the only way my MP4 videos come out ok is if I set De Interlace to NO and if I set Interlace to NO.

I thought since DVDs are Interlaced I sould just stick with making my MP4s Interlaced as well.

But they come out playing in a split screen?
 
Have you checked the output file to see what the scan type is? You can use utilities like GSpot, Mediainfo. Most video processors have one that list the properties of a video (in Format Factory it's in the Advanced tab).

You've been through almost every video converter without success. Have you tried Auto Gordian Knot? The illustrated tutorial is here. I can't help you out with it as I no longer have it installed. I had no issues with it other than the file size was quite variable. Very simple to use and will automatically reduce speed to 24fps where applicable.
 
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